Give priority to REQUEST when searching "portal_type" argument for list method.

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@5679 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5Form/ListBox.py

@@ -800,7 +800,7 @@ class ListBoxWidget(Widget.Widget):
             # Remove useless matter
             for cname in params.keys():
               if params[cname] != '' and params[cname]!=None:
-                kw[cname] = params[cname]
+                kw.setdefault(cname, params[cname])
             
             # Try to get the method through acquisition
             try: